[  511.670170] bond0: (slave eth0): making interface the new active one
[  511.670328] bond0: (slave eth0): Enslaving as an active interface with an up link
[  515.859786] bond0: (slave eth0): Releasing backup interface
[  515.931288] bond0: (slave eth0): Enslaving as an active interface with an up link
[  520.088377] bond0: (slave eth0): Releasing backup interface
[  520.126112] bond0 (unregistering): Released all slaves